At the time I got your images, I also found an overhead projector on ebay ($35+bulb). I used "photoshop elements" to trace the edges of some silhouettes, print on a transparency, projected them on my kitchen cabinets, and painted in the outline. I've attached a couple of pictures, let me know what you think.

Obviously, I plan to project the same way onto steel, trace the outline onto the metal, and plasma-cut it by hand - not as fun, but it works.

It seems like the "project and paint" method can also be used to put images on my horse trailer, lamp shades (might not even need the overhead for that one - I weld horseshoe lamps, I'll send you a picture if I make a shade like this), or just about anything.